F in apatite

[Mark Purnell <map2@xxxxxxxxxxxxxxx>]

I have been following recent discussions of REE's etc. in conodonts; I don't think I can 
contribute anything that previous correspondents don't already know.
BUT, does anyone know anything about F in apatite.  How mobile is it over geological 
timescales?  Does F content in fossil biogenic apatite reflect in vivo concentrations or 
postmortem loss/gain?
Just thought I'd ask.



Dr Mark A. Purnell

Department of Geology, University of Leicester
University Road, Leicester LE1 7RH, U.K
tel: 0116 2523629  fax: 0116 2523918